Results 41 to 50 of about 5,805 (202)

“Skylights” increase exposure levels and reduce the maximum depth of nature reserves “天窗”增加自然保护区的暴露水平,降低最大深度

open access: yesIntegrative Conservation, Volume 3, Issue 2, Page 142-147, June 2024.
In the process of integrating and optimizing of nature reserves in China, preserving farmland would increase the exposure level and decrease the maximum depth of nature reserves. Abstract Spatial contradictions between nature conservation and social development are prominent in the integration and optimization of nature reserves (NRs) in China.
Haiyang Gao, Di Zhu
wiley   +1 more source

以坡地土壤厚度及垂直結構探討淺層崩塌潛勢區位 [PDF]

open access: yes, 2014
The factors related to shallow slope failures include soil depth, vertical soil structure, and bedrock topography. In this study, we surveyed spatial variations of soil depth and vertical soil structure by conducting simplified penetration tests, and ...
Meng-Chun Chan   +3 more
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Influence of the Rainfall Parameters on the Stability of Landslide Dams [PDF]

open access: yes, 2014
This study investigates transient seepage using a two-phase flow scheme in finite difference code, FLAC. The saturation of pore water pressure distribution and the stability of the assumed landslide dams are calculated.
Fan-Chieh Yu   +7 more
core  

Application of Ground LiDAR for The Investigation of Outcrop Discontinuities and Estimation of Associated Engineering Characteristics [PDF]

open access: yes, 2014
Reliable and direct information about rock slope materials and discontinuity parameters from field investigation are keys to engineering design, structure maintenance and soil/water conservation. Under the impact of global climate change and the surge in
Cheng-Hung Ko   +15 more
core  

关于水土生态与水土生态保持几个问题的探讨

open access: yesShuitu Baochi Xuebao, 2011
水土生态与生态学、水土保持是什么关系?水土生态保持就是植树造林吗?水土生态保持等同于环境保护吗?水土生态保持有何价值和意义?本文拟就这些问题进行一些探讨。1水土生态与生态学的关系问题生态学是研究生物的生存条件,以及它们与其赖以生活的环境之间相互关系的科学[1]。就其研究对象 ...
孙发政
doaj  

極端水文事件土砂量對陳有蘭溪河川型態演變影響分析 [PDF]

open access: yes, 2014
The total sediment yield from the 1999 Chichi earthquake to Typhoon Morakot in 2009 in the Chenyoulan River watershed is around 158.1×106 m3. The excess sediment yield has resulted in serious sediment deposition, widening river width and river meandering
Chun-Hung Wu   +5 more
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嘉陵江上游低山暴雨区不同水土保持林结构模式水源涵养效益研究

open access: yesShuitu Baochi Xuebao, 2004
水土保持林的水源涵养效益是研究森林防止水土流失的一个热点问题。以20世纪80年代末期营造和自然恢复的湿地松林、桤柏混交林、刺槐(灌木)林 、刺槐林 和桤木林为研究对象,选择林冠截留、土壤容重、土壤孔隙度、土壤贮水能力、土壤渗透性和枯落物持水性,作为研究不同水土保持林结构模式水源涵养效益的指标,对不同水土保持林的水源涵养机理和水源涵养效益进行了较深入的研究。结果表明,各水土保持林的水源涵养能力均明显高于农耕地;不同水土保持林结构模式的水源涵养效益也有较大差异。最后提出了桤柏混交林、湿地松林 ...
宫渊波 麻泽龙 陈林武 胡庭兴 张健
doaj  

地下水引發自由端順向坡土體滑動特性分析 [PDF]

open access: yes, 2014
Retrogressive sliding can be observed in groundwater-induced landslides. The major inducing factor of this phenomenon is the fluidization in the down-hillslope and the soil of the bottom-layers.
Chun-Hung Wu   +5 more
core  

水土保持林树种结构调整技术研究

open access: yesShuitu Baochi Xuebao, 2003
针对辽西水土保持林中油松纯林集中成片、松毛虫猖獗的树种结构现状,采用了廊道式、斑块式、林中空地、林中沟壑、封山育林、飞播造林和营造混交林7种调整方法,对油松纯林进行了树种结构调整试验.根据不同树种水分利用、生长情况等综合指标,筛选出了14个适合水土保持林树种结构调整的树种.通过不同调整类型的对比试验及适地适树原则,划分并营建了适合辽西水土保持林树种结构调整的3种调整模式.试验结果表明,水土保持林中的油松纯林经树种结构调整后,林分中松毛虫不再大发生,水土保持功能有了明显提高,林木生长加快 ...
郭浩, 李树民, 陈国山, 范志平
doaj   +2 more sources

降雨對南橫公路 50至110K 沿線山崩潛勢之影響 [PDF]

open access: yes, 2014
本研究蒐集中央地質調查所製作之2004 年敏督利颱風、2009 年莫拉克颱風及2011 年7 月19 日豪雨三場事件的事件型山崩目錄作為分析山崩組樣本,運用統計方法中的羅吉斯迴歸法建立潛在因子之山崩潛勢分析模式,首先初選高程類因子、坡度類因子、坡向、全坡高、岩性、地形粗糙度、坡度粗糙度、平面曲率、剖面曲率、總曲率、道路距、水系距等潛在因子,投入因子複選流程,篩選出不同事件下對於山崩鑑別能力較好的潛在因子。再加入各事件不同延時下的平均降雨強度作為誘發因子,將道路沿線之山崩潛勢值分為穩定、低 ...
Chia-Chi Chang   +6 more
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